“I was born in a small town,” John Mellencamp sang in 1985. “And I live in a small town.” Actually, according to a recent issue of that small-town staple Architectural Digest, Mellencamp currently resides in Montecito, California, on “six acres of land at a mountainous peak.” It’s not a little pink house. It’s a rambling, white-painted former ranch with Spanish-style decor inspired by Karl Malden’s house in the movie One-Eyed Jacks. Ain’t that America.